RT is Russian state media, thus its propagandist, its not a real news outlet. There is no "journalism" tradition there in terms of ethics, trust, standards, etc. It follows the party line and the Kremlin's needs, which currently are to make the US/West look as bad as possible.
An important caveat is that they also post lots of normal content, so that it's harder to argue that RT should be blocked outright, and harder to identify the propaganda.
